Method of making cloth boards and similar articles



Dec. 7,1926.

H. B. slvnfrlA-il METHOD'OF MAKING'cLo-H BOARDS AND SIMILAR ARTICLES 2 SheetsSheet 1 Filed oct. 1s, 1923 .k WNlN Dec.. 7 1926.v

H. B. ,SMITH A METHOD 0F MAKING CLOTH BOARDS AND SIMILAR ARTICLESv Filed Oc't. 18 192.3 2 :Sheets-Slide?. 2l

Patented Dec. 7, 192e.4

HARRY BRIDGMAN saturn,V OF BROOKLYN, NRW YORK, AssIGNOR To LIGRTSHIP CLOTH BOARD CORPORATION, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

METHOD 0F MAKING CLOTHBOARDS AND SIMILAR ARTICLES.

Application led October 18, -1923. Fiel-iail No: 669,388

My invention relates to methods of'pro-l ducing cloth boards and similar articles of the general characteidisclosed in companion applications executed on even date herewith.

The general object of the invention lis to provide very rapid and economical methods of producing these articles,pwhichI are at the same time adapted for the production of cloth boards composed of inexpensive materials and which are unusually light and Vstrong and have other desirable characteristics as sufficiently pointed out in the above mentioned companion applications.

An important characteristic of the invention is the-generally continuous method of handling the materials to produce a continu.- ous assembly and producing the individual articles by severing the assembly transversely. Another important characteristic is the provision of a production method in accordance with which one or more strips or webs -of suitable core material are advanced from rolls', creasedvor embossed when such treatment is desired, adhesively treated, and a.

continuous strip or web of envelope orcover material is advanced from a roll, this web lbeing much wider than, and usually more than twice as wide as the core strips, the cover web being, when desired, scored or creased to facilitate folding, treated with adhesive whenever necessary in view of the mode of4 applying adhesive to the core materials, the 'various sQips or webs\are brought together to form a continuous assembly, at

a 'suitable point in the concurrent advancev of the materials the -projecting margins of tire cover or envelope is secured in adhesive engagement with the core, and at a suitable point in the advance of the completed assembly so produced, it is severed transversely at suitable intervals to produce the individual cloth boards or analogous articles.

The -characteristics and advantages of theinvention arefurther sufficiently explainedv in connectionwith the following detail description of the accompanying drawings, which suliiciently explain representative performances of the process. After considering these examples, persons skilled in the art will understand that many variations may be madewithin the principles of the inventhe cover web are folded over and the ention, and I contemplate the employment of any methods ormethod steps which are properly within 4the scopejof the appended claims.

.Figure 1 is a perspective diagrammatic view explaining one performance of the method.

l Figure 2 is a perspective view of a cloth board produced by this method, certain parts being broken away for explanatory purposes. P

`Figure 3 is a' similar View explaining a variation of the method, with particular reference to embossing the filler strips or certain of them.

Figure 4 is a lperspective view of a .cloth board produced by the method of Figure 3,

broken away for explanatory strip or lweb 1 of suitable core or filler material is drawn from a roll 2; another web 3 of filler material is drawn from a roll 4 and a third 'web 5 of filler material is drawn from a roll 6. f n some cases only one strip or web of 4filler material may be used or any reasonable plurality of strips a perspective cend view of a v In the method as exemplified in Fig. 1,'a

or webs may be provided depending on the desired nature or thickness of the materials, the necessary strength or thickness of the board to be produced, and other considerations. When a plurality of webseare provided they may be similar and of similar thickness, or the character of the materials in the different webs maybe different or they may be of diferentthicknesses.

In most cases the, filler is composed of a plurality of webs of cardboard or like material of substantial but moderate thickness so that it may be conveniently' furnished in roll form.

vA strip or web 7 of suitable cover. or envelope material is advanced fromv a roll 8.' The cover web may be of any suitable fibrous sheet material usually paper of substantial thickness and toughness, or card- K board of suitable thickness, usually some- 'fwhat-thinner than the ller webs although not necessarily so. The cover web is wider than the filler strips and usually more than twice as wide, to p-rovide for folding `the cover web completely about the filler,

' claims.

*overI which the web passes.`

'l and is in contact with the we v horizontal line, and

travels at a glue supply pi 0'?" a pool or puddle of'glue supported provide' a complete smooth-suraced envelope therefor. i

The further steps be described as particularly illustrated Fig. 1, without' attempting to explain all the practicable variations, 'these variationsso :tar as they are not particularly explained being comprehended inthe scope 'of the appended Filler web 1 is drawn over a suitable guide l0 which in this case isa glue pipe, and one` or both surfaces ot the web are treated with adhesive. For instanceaglue may be discharged on surface 1l. by perforations 1 2 in pipe l0 and glue may be applied to the ot er surface 13l through rforations in another glue ipe 14. iller web 3 is passed over a suita le guide which, for convenience, isa glue pipe 16, but since this web in tliepresent case is a central web of a three layer core, assembly and the confronting faces oi' the other webs are adhesively conditioned, it is unnecessary to supply lglue to either face of web 3. `Fillervveb 5 is passed over a suitable guide which is conveniently a glue pipe 17 and the glue is supplied to suriace 18 o the web through periorations in pipe 17 and glue is applied vto the other face of the' web through periorations in glue pipe 16 above mentioned which is conveniently located or this purpose.

Provision is made for appl one surface of the cover web 7. "is applied all over thissuriace it is possible to omit the application of glue to the under surface of filler web 5 and the upper surface ofvfiller web 1. The various glue applica- A tions mayfbe regulated as may be convenglued surfaces are provided for the complete adhesive attachment ient, so long as of the cover web to and about the core.

In thel present and 21 are arranged 'above a surface of the cover web adjacentto a guide roll 22 One of the roll the otherroll is free from it.. The rolls 20 and 21 are. in contact along an approximately they are driven in opposite directions with their engaging faces moving downward asA indicated by arrows. Preferably, one of the rollsis driven faster than the other; for example, when roll 21 the surface speed `of the web, roll 20' may bedriven eitherfaster orfslower to produce' a rubbing contact 'and amore even distribution of glue on the surface of glue applying r ll 21. Glue is supplied from perforations in the lower surface of rolls -21 constitutes the' glue applying1 ceptacle provide by the surfaces of rolls 20 and 21 above their line of contact, {origiof the method willznow.

vgl glue to ien glue example two glue rolls 20 A 24 to the trough-like re-A v the roll surfaces; at theendof-the rolls and may bejcaught y suitable trough (not shown). ln

supplie with. a tilm of glue oi' suitable thickness, 4and thisv is applied to the upper surface of web 7 when it is desired to coat that web.

When' 'necessary orde'sirable on account 'of vthe quality 'or thickness of thel cover web, or' for other reasons, longitudinal scores, creases o r folding lines-26 may be formed in the cover web, `the positions ot' these lines corresponding to the longitudinal edges the. web is usually convenient to or creases prior to app ication oiglue to the web and before assembly contact oi' the cover webwith other materials.

this purpose any suitable creasing or scoranterior to glue roll 2l. The particular devices illustrated may be rotary scoring wheels or creasers cooperating with 'guide roll 22v or they may be grinding wheels to remove a part 'of the web .material Any known or suitable scoring or creasing devices nay be employed.

At suitable 4points in the advance of the materials they are brought into assembly contact. The order of engagement 4of -the diierent webs' may vary greatly.` ln sonic cases all of the filler webs may be brought together'to orina filler may then come vin contact with the cover web; otherwise the `filler may be progres-v sively built up after certain parts oi it have been brought in contact Xwitlitlie cover web, as in theV present example.

Filler web-'f5 whether glued on one sui-- face or on both surfaces as above stated, is

assed under a guide and which presses the fillerweb inv adhesive en gageinentwith the central zone of the cover- A'vi/'eb 7 between the oldedllines`26, if ,those lines are 'produced upon the cover, or otherand excess gluev spills away oi the core material about whigh l is to bel subsequently folded. it

roduce there scores For assembly which 3 is led under a guide and pressing 1 is led under a similar the, surace of roll 21 is evenly' pressing roll 3U ilo roll 3 2, which brings 'the adhesively coated under'surface of the'web in contact with the upper surface of web 3, completing the core structure, which from that point'pi'oceeds with the envelope"web, constituting the continuous assembly', not fully fori/neder vshaped into desired complete cross-sectional form'. 1'

lesive-above Edescribed, to additionamethod' of applyingv distribute tli'e adhesiv'eupon which is complete so far as-itsv components are concerned., but" It' iS- desirable in coiglunction with I the spreader uniformly the'webs; and 'fianthis isconvenientlytalt ough'not necessarif i ly, donein conjunction with the applica# 430, supported tion of the successive webs to theI assembly by. pressing rolls 30 and 32, reference to web 3 and its pressing roll 31 being omitted because in the present example no adhesive is applied to that web. For this purpose a glue distributingroll 34 is arranged adjacent to roll 30 and web 18 is led between the two rolls and yielding pressure' is applied to the journals of rolls 34, so that as the web passes between the rolls it is pressed.

and the adhesive on o'ne or both faces is rolled or squeezed' and vuniformly distrib-- uted. The rolls 30 and 34 rotate as indicated by arrows and exert a squeezing effect upon the webv and the adhesive carried thereby, and when the adhesive is supplied in suitable quantity thereis usually a slight excess of adhesive which, by the' squeezing action and movement of the rolls is forme into a shallow uddle or mound of adhesive by the adjacent roll surfaces and in contact with'the faces and edges of the web 18, so that the'web passes through this lpuddle and is very completely and ef-4 fectively coated. To. provide further for the effective application of the adhesive the rolls may in certain cases be drlven at different speeds so that, for example, while roll 30 is usually driven atgthe surface speed of the web, roll 34 may be driven faster or slower to vproduce a rubbing effect and .thus still further improve the uniformity -of distribution and application of adhesive to the web. -A glue distributing roll 36 is ,similarly arranged adjacent to pressing roll 32, to act upon web 1 and distribute or regulate the adhesive thereon in 'a similar manner. f'

The completely assembled materials nou1 proceed to a convenientl point at which the projecting margins 7a of the cover web are 'folded about the longitudinal edges ofthe core strips and upon the upper flat surfaces of the core and pressed in position to secure them by adhesive previously placed upon the cover web or the upper surface of the top core web l.' Any suitable devices (not shown) maybe used for performing these operations. Ata suitable point in the further progress of the assembly its edges are acted upon by any suitable devices suiciently indicated by channel-ed ed pressing rolls 38 to,k smoothly press t e envelope edges; and preferably these -rolls are so,"

formed, or the assembly is so treated, that .edges 39 are convexly rounded and any .sharp corners at 40 are substantially eliminated.

The cover web is desirably of such width that when folded over and secured as abovev explained, its longitudinal edges 41 do notv overlap but'closely meet o r abut to provide a smooth surface finish. v

At a suitable point in the further advance of the now. completely formed assembly it is severed transversely by an suitable de-A vices suiliciently represented l y cutters 42, the severing operations being performed usually at regular intervals to produce the individual cloth boards -B. While Areciprocating cutters are here shown for the sake of` simplicity, the severing devices may be so arranged, for instance by mounting them on rolls, that there need be no stoppage of movement of the continuous assembly inci- 4 dent to the cutting operation, or for any other reason.

Any suitable devices (not shown) may be'y provided to insure 'the proper advancing movement of the materials, for instance any suitable traction defvices. may be provided anterior to the cutting point to properly advance the continuous assembly.

vThe result of the said operations is the production in rapidsuccession of completed cloth boards or similar articles which,` in accorda-nce with the particular production method described, and as sutliciently shown ture l" consisting of a plurality of sheets or layers of fibrous Vmaterial 1, 3 and 5, ad-

hesively secured together, and a cover or enf velope C\ consisting. of a sheet of fibrous material wider than thel core sheetsy and folded about them Vto completely andl in Figure 2, comprise a core or filler struc` asf ' viewv particularly to producing a cloth board' or like article in which some Aor all of the filler seats are creased, ribbed *or embossed in order to produce an article having greater strength or st iiness, or greater thickness with a given quantity or weight of material, resulting in an immense economy in the amount of cardboard or other fibrous mate- /rial used, and a very considerable economy in adhesive and also producing a board which is exceptionally light for given dimen slons, strength and stiffness, and therefore is ve economical both 4as to' its original cost an in respect to shipping costs either whenv the boards are shipped in quantity to textile manufacturers or converters, or when fabric bolts including such cloth boards, are.

shipped to jobbers or other consumers. 1 For this purpose, in the particular per-- formance of the method illustrated in Figure 3, the webs 1, 3 and 5 are arranged and advanced as in the previous example, and prior to assembly contact one or more of the Webs are treated to produce suitable embossed formations thereon'. In the broader aspect of the invention the word embossed or similar- 'words indicating operations performed on the webs, are' used in abroad sense toindicate the production of any suitable pro'ections and depressions in the core webs. n 4a more limited sense, of course, I refer to ribs of amore or less continuous character formed in the `webs and for convenience such ribs are usually straight and are usually arranged transversely of the webs, in view of the relative difliculty of producing longitudinal ri-bs orv creases, in the may be performed upon I structure of the and the shafts are l' vly so on.

f my invention and is more claimed in' a' separate application. While in present particular example, the ribs are produced in a generally transverse direction, but

are arranged dia onally. of the webs and so that different we s, or adjacent webs, have the ribs running in different directions or at different angles. Embossing operations all of the webs, but

. in the present example only the upper and lower core webs are treated, and the central core web lis left plain or smooth. -To perform the stated operations web 1 is* passed between cooperating diagonally arranged creasing devices and 51 which have cooperating elements acting onv4 upper and lower surfaces of the web to produce the 'spaced' ribs 52 thereon. The nature of the embossing elements, and. the character of the ribs may vary greatl the elements which actually operate upon the web are such that thev librous or laminated web or board is more or broken down and drawn together to form' a rib which is convex in this instance on the upper side of the v web and concave on the lower side, this being of the general char- ,butin a preferred, instance leSS acter. which If designate as a crimp-crease.-

The creasing elements controlled by two' eccentri'cs 53 and4 54 .mounted on 'shafts 5,5v and56` respectively,

50 and 5,1 are`eac'h driven at aV suitable speed4 in the direction indicated by the arrows, 'so

that as the creasing elements 'converge they.

move along with the web and the crimping lor embossing action is elements are moving substantially or ex ctatweb speed, and then as the operati n 4is Vcompleted the elements are separated and soreturn to a forward position, again converge and perform a creasing operatiom'and The particular mechanism diagram- 'maticallyshown and briey explained is of fully 'l operations performed whilelthfe disclosed and v tinany cases'it'is preferred to use mechanism of this type for the other Icreas' or embossing4 mechanism adapted or" be employed. l VJThe lower web 5f is operated upon by'l embossingdevices, such as ribsqon this web, however,

indicated purpose, .any

any suitable orsimilar agxptable for the Lrpurpose may or other *outer filler to -those of web.1. The diagonal 'and adhesively' anglefof the ribs on their. respectivej webs,

relative angle may vary considerabl ,the 'I relative angle as tiall 90.

l hile adhesiv may be applied tosurfaces of the embossed webs by any known or suitathem torefelable ble devices, to adhesively secure ether or to the cover web, it is 1n some cases, as illustrated in t e present specific example', to ap' ly adhesive to secure the core-.structure toget er to the central web 3, both surfaces of this web being adhesively coated by glue pipes and 61, the latter of which acts as a guide for thewe'b, this arrangement being substantially as described in connection with the glue devices 10 and between rolls 62 and 63, which dissurfac'es and embossing Clargely :tor lthe When deis shown" as continuing onward 1n here shown being su stanre 1. Thecentral'webfisthen.con-

web tothe lower web 5 4 sired all of the corev webs maybe brought provide acontinuo'us together and pressed to association with the core assembly prior to cover web or else they may be successfully Alouiltnp upon the cover web as described in l connection with Figure 1".

The cover web 7 is advanced from thefroll I I 8, creased or scored when desired and its upper .,o'r inner surfaceis adhesively coated byllue rolls 65 and G6/cooperating with the gui e v 'pe 68',- 'substantie example. f The` materials are vnewbrought together secured, and the continuous assembl is completely formed and severed to pro uce individual cloth boards B1,-

substantially similar to those explained in connection with Figure 1.

The product in this case is a'cloth comprising a core structure F1 consisting of an intermediate sheet 3 'of smooth flat iibrous' material, and outersheets or layers 1 and 5 of embossed fibrous sheet material, the.'

ribs being in this particular example diagonally arranged, and each other, cured .together by faces of the outer adhesion of ribbed sur- .sheet 3. "By suitable or obro's' variations 158 and 59,*thebeing preferably" arranged diagonally at a substantial anglev -"of the method asdescribed, adhesive for securing the-core members together may be' appliedto the crest of the ribs, instead of sheets to the intermediate" roll's`67 and "supplied with gluebyv a ly as in the previous,

board' y diagonal. in relation to the core yparts, being firmly se-k to the intermediate sheet 3, .or Lthe intermediatev sheet fniay will` be supplied to the cr'est of the' ribs of one or both of the embossedsheets, to secure them together, or in' some v"cases .only one be omitted and then adhesive' embossed core sheet may be provided and in that case it is secured adhesively to the envelope.

The core structure conslstmg m this specific example of the three sheets as' described,

is venclosed in the envelope C Wl1ich,`in this example, -is a single piece of fibrous sheet A material smoothly covering and closely ad- ,heringto the broad faces and longitudinal 10 edges of the core, having abutting (and not overlapped) edges 41, andalso preferably having rounded longitudinal edges 39 as explained in connection with Figure 2. L The advantages, characteristics, and variations in structure of such cloth boards including corrugatedmaterial, are further suiiicientlyf.l

explain-3d in one of `my above mentioned companion appllcatlons.

Certain creasing instrumentallties and .other mechanical features represented in the drawings are more fully disclosed and are claimed in other applications, and no claim -is here made to these mechanical features.

Reference is hereby made to co-pending application, Ser. No. 653,506, filed July 24,

1923, Whichdiscloses a method analogous in.

material, applying the filler Webs in superposed relation to the envelope web to pro-v duce a continuous assembly supplying adhesive to certain Web surfaces prior to assembly contact, folding the envelope web along the crease lines and securing outer portions ual articles.

of the envelope Web upon the iller material,

'and' transversely severing the continuous as` sembly so produced to produce the individ- 2. A. method of producingcloth boards and similar articles, comprising advancing a continuous Web of vfibrous sheet envelope material, producing therein longitudinal.

-creases substantially in line with edges of filler material to be applied, advancin one or more continuous narrower Webs of fi rous sheet filler material of substantial thickness, applying theiiller Webs ein superposed. relation' to the envelope web to produce a continuous assembly, supplying adhesive to certain web surfaces prior' to assembly contact, the adhesive being applied substantially over theientire area of certain of the sheet surfaces suiiicient to provide adhesive connection of the multiple sheets throughout subf stantially their entir'e .engaging areas, folding the envelope web along the crease lines and Securing outer portions of vthe envelope iveb .upon the filler material, pressing the longitudinal envelope edges Ato produce a smooth rounded formation thereof, a nd severlng the continuous assemblyso ,produced transversely to produce theindivldual ar' ticles.

3. A method of producing cloth boards cr similar articles, comprislng advancing a continuous web of fibrous sheet envelope material, creasing the material o n longitudinal lines substantially corresponding to edgesv of filler material to be applied, advancing one or more continuous 'Webs of fiT brons sheet filler'material substantially narrower than .the envelope web, applying adhesive over substantially thel entire areas of certain surfaces of certain of the'filler webs, sufficient to provide adhesive connection of the various Webs throughout substantially their entire engaging areas, uniformly distributing the adhesive ,on said surfaces,"

bringing the Webs successively in assembly contact to produce a continuous assembly in which the filler is superposed on the envelopeweb with margins of thezlatter `project-- ing laterally from the filler, folding and ad# hesively securing the envelop'e margins upon the filler to completely enclose the same, and

severing the complete continuous'assembly so produced transversely at regular intervals to produce the individual articles.

. LA method of 'producing cloth board and similar articles, comprising advancing one or more continuous webs of' sheet filler material, -diagonally embossing certain'of the webs, advancinga continuous web 'of sheet envelope material substantially Wider -than the filler Webs, applying adhesive to certain of the web surfaces, bringing the webs in assembly contact with the filler located substantiallv centrally of the envelope Webs, folding and a-dhesively securing projectingv margins of the envelope upon the filler to completely enclose the same, and. severing the continuous assembly so proproduce the individual articles.

5. A method of producing cloth boards and the Vlike comprising advancing at least tvvo continuous Webs of sheet filler material,

duced transversely .at regular intervals to producing diagonal creases on one of the Webs, advancing a continuous web of sheet envelope material substantially wider than the filler webs, supplying adhesive to vcertain ofthe web surfaces, bringing the webs together with .the ller webs located substantially centrally upon the envelope web,

folding'and adhesivelysecuringv projecting margins of the envelope upon the filler to enclose the same, and serving the completed continuous assembly'- transversely to -pro'- duce the individual articles.

6. A method of producing cloth boards and the like,` comprising advancing a plu' rality of. continuous 'webs vof sheet lldr 'jacoaaazo` material, producing diagonal ribs on two of -thewebs with the ribs on the different webs at a substantial angle to each other,'advanc ing acontinuous web of sheet envelope ma.- teral substantially wider than the fillerv webs, supplying) adhesive to certain of the web surfaces, rinring lthe webs together with the filler webs located substantially centrally upon the envelope web, :foldingl and adhesively securing proyecting` margins of the envelope upon the filler to enclosel the i same, and severing the completed continuous continuous webs' of i and adhesively secured thereto and with the` assembly transverselyjto produce the individual articles. 'y

'7. A method ofV producing cloth boards and similar articles, comprising advancing sheet iller material, producing diagonal ribs in "angular relation upon at least two othe webs, advancing a continuous web of substantially smooth and dat sheet filler material between two ribbed filler webs, advancing a continuous web of.

sheet envelope `material substantially wider than the iiller webs, supplying adhesive -to4 certain web surfaces, bringing the webs in assembly contact with the vplain filler web interposed between two of the ribbed webs filler structure superposed upon the envei lope web and adhesively secured thereto,

folding over and adhesively securing projecti'ng'envelope margins upon the ller to completely enclose the same and complete continuous assembly, an

the assembly vals to produce the individual articles.

method articles, including the steps of advancing a4 sheet of material,

of producing laminated applying` cooperatlng diagonally arranged creasing instrumentalities to oppositev surfaces v form diagonal ribs orcreases therein, ad-

vancing `the tially sheet 'sp of the sheet to instrumentalities at substaneed while in creasing contact therewith, withdrawing the instrumentalities from sheet contact and retracting them in a ldirection generally movement, ag

opposite to sheet am advancingv the instrumenf talities to sheet contact, and repeating the operation indefinitely toproduce space creases or corrugations upon the advancing sheet. b v Signed lat Kings and State of of Oct., D.

Brcokl n, in the county. of ew York, this 5t day 1923. 1

t RY-BRmGMAN SMrri-i.

roduce a severing transversely at regular inter- 

